Security lock for window sash



FIG. 1 is a top plan view of a security lock for window sash showing mynew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being amirror image of that shown; and,

FIG. 4 is a bottom plan view thereof.

The rear is plain and un-ornamented, and the broken-line disclosure isfor illustrative purposes only and forms no part of the claimed design.

The ornamental design for security lock for window sash, as shown anddescribed.